#4 – Plank
• Tilted on the edge of the chair, straighten your body upright, and take the board position.
• Guard the back right.
• Hold the board during 30 seconds.
• Try to increase the time by 10 seconds every day.
• Tilted on the edge of the chair, straighten your body upright, and take the board position.
• Guard the back right.
• Hold the board during 30 seconds.
• Try to increase the time by 10 seconds every day.